Tube-cutting tool



Jan. 20, 1931. s. WIEDEKE TUBE CUTTING TOOL Filed June 11,

1928 2 Shoots-Sheet 1 INVENTOR. gUSTAV W/EDEKE.

ATTORNEY Jan. 20, 1931. a. WIED EKE ,572

TUBE cu'r'rme TOOL Filed June 11, 1928 v 2 Shoots-Sheet 2 //V VE N TORGUS TA 1 W/L'DE KE.

ATTORNEY the initial or pilot cutter will perform the major part of thecutting andthe kerf formed by the pilot cutter will be spread or fiaredoutwardly so that thepilot cutterimay pass through that kerf, in makingthe succeeding cut, without 'frictionally engaging the sidesthereof,'thereby eliminating practically all frictional resistance tothe'operationof'the ba t r ref ra ly v s is a emr is d yprovidingv'afiaringfdevicewhich may. be in-.,

the form of a aiaer'and which is somouiited on the tool that itwilltravel in the kerf formed by the pilot cutter and which is'cof a ofthat-kerf, asv is clearly shown" in Figs; 5'

such a thickness that it will enlarge the kerf beyond the thicknessof'the: pilot cutter. "As here shown, the pilot cutter 18 is in the formeta relatively thin" disk the lateral surfaces of whichita'perioutwardly to a sharp cutting edge," The second cutter l9 constitutes theofa; iskwhich is o'fia materially greater thickness thanthe-pilotcutterand ha's'a comparatively blunt edge'but this edgeis tapered toen'ter thekerf formedby the pilot cutter and thus spread'orseparate the lateralwalls and 6; Preferably the flaring cutter also has a cutti'n actionjandwill "tosome extent deepen the g the satisfactory o eration of thedevice. That surface of t e expanding device or wedge 20 which actsonithe carrier 16, for

the pilot cutte'r' il8, is v arranged at agreater inclination'thani'sthelsurface'that acts on the carrier 17 for the spreading diskorcutter.

This shape of the wedge coupled with thethin sharp character of thepilot cutter will cause the pilotfcutter to be at allxtimes advancedmore rapidly and to a greater extent than is the spreadingdisk andconsequently the pilot '"ficutter will perform the major part of thecutting operation.

to the-length of the tool, as shown in Fig; 4,

clined cutter' will tend to draw the cutter into .thetube and will thushold "the guard 24 firmly against the tube sheet. The flarin cutter or'disk 19 has tapered hubs 27 of relatively large diameter and so arrangedthat at thecompletionof the cutting operation one ofthese'hubs' willengage the projecting end portion of the tube and will flare the sameoutwardly, as shown in Fig. 7 ,thus properly pregaring the same for theapplication of the ea on the carrier blocks in any'suitable manner but,in the present instance, each cutter "is rotatably'mounted on'a pin 40,the ends of iwhich are mounted in the carrier block and one endofcwhich' is flattened,'as shown at 41, to'hold the pin againstrotation. 1

Rotary'movemen't may be imparted to tool and feeding movement to flarinor spreading device and is in the form kerf but this is notnecessary toc The pilot cutter 18' is here shown as mount 'ed' on an axis slightlyinclined with relation 45- c so that in the rotation'of the tool this'iningrtool. The cutters may be mounted the expanding device in anysuitable manner. In the present instance, I have shown the tool asprovided with an operating'device' or wrench similar to that describedin the application of Gustav Wiedeke, filed ril 27, 1928; ser al no;maseaana atentei April 29,'1930,"patent number 1,7 56,717. "As hereshown,-the body of the tool has a reduced e 1, 51 IQQPF PW 93 2)? "L Z NhE a e e d polfaeeba n .n w erndir j x sauara tshe e-r The state vice orwedge 20 as connected therewith an *ifiictllating rod 29 which extendsbeyond the end of the body of the tool and is threaded 4:0 receive'a nut30 to which is connected a slotted actuating memberorhandle, 31. The

square or non-circular endp'ortion 28 of the tool is adaptedto receiveasocketmember \32 ofa ratchet wrench 33. The "socketniember is providedwith teeth 35 adapted tobe engaged by'a spring pressed pawl 36mountedinthGbOdyxofjthe wrench so that themovemento fthe wrenchin one directionwill'actuate the socketmember 32 and uponfthe v movement of the wrenchinthe other direction theh andle or body portion thereof will move withrelation to the socket member. The handle portion of the wrench isprovided with a projection 37- which extends through the slot in thehandle or nut actuating member 31, the v -arran'g'ement beingsuchthatupon the forward movementof the ha'ndlethe socket member and actuatingtool, including the nut 30, will rotate in unison. Upon the returnmoVementof-the handle the latter will'move with relation'tothe socketmember and tool. but the projection '37 will'cause the nut to be rotatedina direction to advance the expanding device 20 preparatory to the nextoperation of thecutters. The projection37' is preferablypivotallymounted upon the body of "the wrench and, as'here shown, thelatter'isprovided with a socket 38 into whichjthe projection may be folded. A

spring p'resscd, detent 39 actsfon the pivoted projection to retainthesa to which it" has been moved;

While I have shown and described oneenr g bodiment of my inventionIwi's'h'it to be unm i e Pes e ienf tr in the kerf formedby said cutter,said portion of said disk being of such thickness that it willjenlargesaid 'kerf b dtlie i k e s e eidcufi aid-d k having a tapered hubto engage andiflare the v 7 end portion of the tube -which isbeing cut.

2. In a cutting tool of the characterde scribed, arotatable-.jsupporting structure, a

cutter rotatably mounted on said structure, and means to impart radialmovement, to said cutter, said-cutter having a tapered hub to engage andfiare'the end portionof'the I tube at the completion of thecutting"Opera-T'v v a a scribed, va rotatable sulpporting structure, a

I cutter carried by saidsupportingstructure, a member carried by saidsupporting structure and arranged to travel in the kerf' formed'by saidcutter and spread the walls to said member.

' 7 4. In a cutting tool of the characterde- "scribed,arotatable'supporting structure, carriers mounted onsaid supportingstructure. for substantially radial movement a cutter rotatably mountedonone of said ca-rriersfa disk rotatablyj mountedonranother of saidcarriers and'having'a peripheral portionto travel in the kerf formed bysaid cutter,said

portionof said 'diskjbeingof such thickness that it will enlarge saidkerf beyond the thickness of said cutter, and an expanding device 1acting on said carriers simultaneously to imi part radial movement tosaid cutter and said 7 disk,.said expanding device being v socarrangedith relation to said carriers that said cutter will be movedradially, a greater distanceiwith reference to the rotatable supportingstructure than said disk ismoved.

In testimony whereof, afi'ix my slgnature 1 j I hereto. v I

cutting tool of the 'character de- U V- inners, I j I i

